docs: def get_instance(cls, dependencies=None):
          """
          Return an instance for a contract name.
  
          :param dependencies:
          :return: Contract base instance
          """
          assert cls is not ContractBase, 'ContractBase is not meant to be used directly.'
          assert cls.CONTRACT_NAME, 'CONTRACT_NAME must be set to a valid keeper contract name.'
          return cls(cls.CONTRACT_NAME, dependencies)